[Bug target/33604] [4.3/4.4 Regression] Revision 119502 causes significantly slower results with 4.3/4.4 compared to 4.2

[pinskia at gcc dot gnu dot org]

------- Comment #35 from pinskia at gcc dot gnu dot org  2008-02-27 16:43 
-------
We get:
<bb 3>:
  m__valuem_I_lsm.28 = 1.0e+0 - m__valuem_I_lsm.28;
  ivtmp.30 = ivtmp.30 + 1;
  if (ivtmp.30 != 100000000)
    goto <bb 3>;
  else
    goto <bb 4>;

or:
L2:
        addl    $1, %eax
        movapd  %xmm1, %xmm2
        subsd   %xmm0, %xmm2
        cmpl    $100000000, %eax
        movapd  %xmm2, %xmm0
        jne     L2

or :
L2:
        addl    $1, %eax
        cmpl    $100000000, %eax
        fsub    %st, %st(1)
        jne     L2

All are fast.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|tree-optimization           |target


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33604